Analog Devices Inc./Maxim Integrated MAX336EWI+T

Overview

MAX336EWI+T from Maxim Integrated is a 16-channel, single-ended CMOS analog multiplexer designed to route one of 16 bidirectional analog inputs (NO1–NO16) to a common output (COM) under 4-bit binary address control (A0–A3). It features 400Ω max on-resistance, <20pA NO-off leakage at +25°C, and 3.5pC typical charge injection-enabling precision signal routing in data acquisition systems operating from ±4.5V to ±20V dual supplies or +4.5V to +30V single supply.

For engineers reviewing the MAX336EWI+T datasheet, MAX336EWI+T pinout, MAX336EWI+T application, or MAX336EWI+T equivalent, key selection criteria include rail-to-rail bidirectional signal handling, TTL/CMOS-compatible enable/address inputs, guaranteed low leakage across temperature, ESD protection >2000V, and pin compatibility with DG506 for drop-in replacement in legacy test equipment and instrumentation designs.

Technical Context

The MAX336EWI+T implements a monolithic BiCMOS decoder-driven analog switch matrix with break-before-make switching and fully differential internal control logic. Its 4-bit address decoder selects one of 16 NMOS/PMOS transmission-gate pairs, each independently rated for ±15V analog signal swing and 30mA continuous current.

All digital inputs (A0–A3, EN) are TTL/CMOS-compatible over full temperature range and supply voltage (±4.5V to ±18V), with input leakage <1.0μA and logic thresholds fixed at VAL ≤ 0.8V / VAH ≥ 2.4V-ensuring robust interfacing with microcontrollers and FPGAs without level-shifting.

Key Specifications

Pinout & Package

MAX336EWI+T uses a 28-pin Wide SO (SOIC-W) package with 300-mil body width and standard gull-wing leads. Pin pitch is 1.27mm; thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog multiplexer applications.

Compared with MAX336CWI+, MAX336EWI+T delivers extended temperature reliability without design change; versus ADG1206BRUZ, it trades 210Ω higher R_ON for 25× lower leakage and characterized charge injection-making it superior for precision DC and low-frequency measurement systems.

Availability

MAX336EWI+T is available at Aetrix Electronics and suitable for precision data acquisition, automated test equipment, medical instrumentation, and industrial sensor interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX336EWI+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX336EWI+T belongs to Maxim's precision analog multiplexer product line, engineered specifically for low-leakage, low-charge-injection signal routing in metrology-grade and safety-critical measurement systems.

FAQ

What is the maximum allowable supply voltage difference for MAX336EWI+T?

The absolute maximum voltage difference between V+ and V− pins of the MAX336EWI+T is 44V. This allows operation with asymmetric supplies-for example, +24V and −5V-as long as the total differential does not exceed 44V and each supply stays within its individual rating (V+ ≤ +44V relative to V−, V− ≥ −0.3V relative to V+). Exceeding this risks permanent damage due to internal junction breakdown.

Does MAX336EWI+T support single-supply operation, and how is it configured?

Yes, MAX336EWI+T supports single-supply operation from +4.5V to +30V. To configure it, connect V− to system GND, apply the positive supply to V+, and ensure all analog signals remain within 0V to V+ (e.g., 0V to +15V for a +15V supply). The device retains full bidirectional switching capability and specified leakage performance under this configuration, as verified in the Electrical Characteristics table for single-supply conditions.

Is MAX336EWI+T pin-compatible with the DG506, and what does that mean for legacy designs?

Yes, MAX336EWI+T is explicitly documented as a pin-compatible upgrade for the industry-standard DG506. This means identical pin assignments, footprint, and electrical interface-allowing direct replacement on existing PCBs without layout modification. Key improvements include lower leakage (<20pA vs. ~100pA), reduced charge injection (3.5pC vs. ~15pC), and enhanced ESD tolerance (>2000V vs. unspecified), making MAX336EWI+T a validated drop-in enhancement for aging DG506-based test and measurement systems.

What is the significance of the 'E' grade in MAX336EWI+T, and how does it affect system reliability?

The 'E' in MAX336EWI+T denotes the extended temperature grade (−40°C to +85°C), certified per Maxim's industrial qualification standards. This grade ensures all electrical parameters-including on-resistance, leakage, and switching times-remain within datasheet limits across the full range, unlike commercial-grade 'C' parts limited to 0°C–70°C. For outdoor, factory-floor, or automotive-adjacent applications where ambient temperatures fluctuate widely, MAX336EWI+T provides guaranteed performance and long-term reliability without derating or thermal management overhead.

How does the enable (EN) pin function, and what are its timing constraints?

The EN pin on MAX336EWI+T is an active-high digital control that globally enables or disables all 16 analog switches. When EN = low, all channels are open (high-impedance); when EN = high, channel selection follows A0–A3. Enable turn-on time is ≤750ns over temperature, and turn-off time is ≤750ns-critical for synchronizing with ADC sampling clocks or FPGA state machines. Input thresholds are TTL/CMOS-compatible (VAL ≤ 0.8V, VAH ≥ 2.4V), eliminating need for external level shifters when driven directly from microcontrollers.